Re: Create indipendent library for manage read/write operation for different content

From: mr.abanjo (mr.abanj..mail.com)
Date: Tue Jun 22 2010 - 14:49:07 UTC

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    Hi Evgeny,
    thanks for your great suggest!
    I think it should works also for me.
    I'll try it :-)
    Davide

    On Mon, Jun 21, 2010 at 9:00 PM, Evgeny Ryabitskiy <
    evgeny.ryabitski..mail.com> wrote:

    > Hello!
    >
    > I can see same problems I have met almost a year before.
    > Also have module architecture...
    >
    > First of all don't use Configuration.initializeSharedConfiguration(
    > fileConf );
    > It's not for module applications...
    >
    > You could use something like this:
    >
    > Configuration conf = new DefaultConfiguration("module1-cayenne.xml");
    > conf.initialize(); //mandatory. Means "load and parse my xml".
    > DataDomain module1Domain = conf.getDomain(); //actually it's a
    > factory for DataContext based on configuration
    > DataContext module1Ctx = module1Domain.createDataContext(); //here we
    > go! we got context for module1
    >
    >
    >
    > Evgeny.
    >
    >
    >
    > 2010/6/21 mr.abanjo <mr.abanj..mail.com>:
    > > Hi,
    > > i'm working with a lot' of web sites. Most of them must connect to the
    > some
    > > databases to read / write data.
    > > So, for every kind of "content", i've created a library (jar) that
    > manages
    > > the database's operations.
    > > For example, user, news, meteo ecc.. are managed in different libraries
    > > included in different war (one for each webapp).
    > > In this way, i have a single code to mantain, and if i must fix some
    > error i
    > > can change the code in a single place, and all webapps get the fix when i
    > > recreate the war.
    > > Now, the problem is that i want to let the library to be indipendent from
    > > the webapps that use it. In the jar i put the cayenne.xml and the
    > > corresponding datamap, but if a webapp need to load different kind of
    > data
    > > (es meteo, and news) in the war i have more than one "cayenne.xml"
    > file.(es
    > > meteo_cayenne.xml, news_cayenne.xml).
    > > I can use different names for them but what's happen when i call:
    > >
    > > Configuration.initializeSharedConfiguration( fileConf );
    > >
    > > for each file?
    > > Is this the right way?
    > >
    > > Also i can leave the datamap in the library, and the cayenne.xml file in
    > the
    > > webapp, using different "domains" declared in it. But in this way, the
    > > library is not completly indipendent. What i want to obtain is that the
    > > webapp don't know nothing about a database/cayenne (except declaring the
    > > jndi connection).
    > > There is a way to reach this objective?
    > >
    > > Thanks,
    > > Davide
    > >
    >



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